Prospective prediction and exploration situation of marine Mesozoic-Paleozoic oil and gas in the South Yellow Sea

Chen, Jianwen; Xu, Minggang; Baohua, Lei; Liang, Jie; Yinguo, Zhang; Wu, Shuyu; Shi, Jianrong; Yuan, Yong; Wang, Jianqiang; Zhang, Yuxi; Chen, Yingjie; Wang, Wen‐Juan

doi:10.31035/cg2018072

Cited by 6 publications

(10 citation statements)

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“…Three complete sourcereservoir-caprock assemblages are developed in the SYSB. The first assemblage is composed of the Hetang Formation as the source rock, Late Sinian Dengying Formation and Ordovician limestones as the reservoirs, and the Late Ordovician Wufeng Formation-Silurian Gaojiabian Formation as the seals [50]. The second assemblage is composed of the Late Ordovician Wufeng Formation-Early Silurian Gaojiabian Formation as the source rocks, Middle-Late Silurian-Late Devonian Wutong Formation and Carboniferous-Early Permian Qixia formation as the reservoirs, Late Permian Longtan-Dalong Formation as the seal [51].…”

Section: Geology Backgroundmentioning

confidence: 99%

Carboniferous-Early Permian Heterogeneous Porous Carbonate Reservoirs Prediction and Sedimentary Analysis in the Central Uplift of the South Yellow Sea Basin

Wu¹,

Sun²,

Li³

et al. 2022

Preprint

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Mesozoic-Palaeozoic marine carbonate rocks are important hydrocarbon reservoirs in the Central Uplift area of the South Yellow Sea Basin (SYSB). Due to the lack of boreholes and the great heterogeneity of carbonate reservoirs, the distribution of porous carbonate reservoirs and their related key controlling factors remain unclear. Based on seismic inversion and isotope analysis, this study explores the factors affecting the distribution of porous Carboniferous-Early Permian carbonate reservoirs in the SYSB. In this study, the log-seismic characteristics of porous carbonate reservoirs, sensitive lithology parameters, and physical property parameters are extracted and analyzed. The pre-stack simultaneous inversion technique is applied to predict the lithology properties and physical properties of the porous carbonate reservoirs. Moreover, the sedimentary of carbonate is analyzed using isotopes of carbon, oxygen, and strontium. The results indicate that porous carbonate reservoirs with porosities of 3%~5% mainly occur at the paleo-highland (Huanglong Formation and Chuanshan Formation) and the slope of paleo-highland (Hezhou Formation). The porous carbonate reservoirs of the Qixia Formation are only locally developed. In addition, the study area was dominated by a warm and humid tropical climate from the Carboniferous to Early Permian, with four sea-level eustatic fluctuation indicated by the negative and positive δ13C excursions. When the sea level fell, the study area was exposed and denuded, and the supply of terrigenous detrital was dominated, which significantly influenced the carbonate deposit and diagenesis. This study highlights that sedimentation was a key factor in controlling the quality of Carboniferous-Early Permian carbonate reservoirs. The methods proposed in this study can be used in other carbonate-dominated strata worldwide.

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Section: Geology Backgroundmentioning

confidence: 99%

Carboniferous-Early Permian Heterogeneous Porous Carbonate Reservoirs Prediction and Sedimentary Analysis in the Central Uplift of the South Yellow Sea Basin

Wu¹,

Sun²,

Li³

et al. 2022

Preprint

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“…The South China Sea (SCS) is one of the major sedimentary basins in the world and one of the four major global submarine oil reserves. , In recent years, with the energy demand of neighboring countries, the scale of oil and gas extraction in the sea area has continuously expanded. , Moreover, the SCS is also a vital navigation area for China’s import and export cargo ships, which carry an estimated one-third of global shipping. , With the implementation of China’s “Belt and Road” strategy, Chinese import and export trade has increased significantly. The continuous exploitation of offshore oil and gas fields and the busy shipping industry undoubtedly worsen the ecological environment in the SCS.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 The South China Sea (SCS) is one of the major sedimentary basins in the world and one of the four major global submarine oil reserves. 9,10 In recent years, with the energy demand of neighboring countries, the scale of oil and gas extraction in the sea area has continuously expanded. 11,12 Moreover, the SCS is also a vital navigation area for China's import and export cargo ships, which carry an estimated one-third of global shipping.…”

Section: ■ Introductionmentioning

confidence: 99%

Sources of the Elevating Polycyclic Aromatic Hydrocarbon Pollution in the Western South China Sea and Its Environmental Implications

Han,

Yu,

Zhang

et al. 2023

Environ. Sci. Technol.

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The environmental implications of polycyclic aromatic hydrocarbons (PAHs) caused by the vigorous development of offshore oil exploitation and shipping on the marine ecosystem are unclear. In this study, the PAH concentrations were systematically characterized in multiple environmental media (i.e., atmosphere, rainwater, seawater, and deep-sea sediments) in the western South China Sea (WSCS) for the first time to determine whether PAH pollution increased. The average ∑ 15 PAHs (total concentration of 15 US EPA priority controlled PAHs excluding naphthalene) in the water of WSCS has increased and is higher than the majority of the oceans worldwide due to the synergistic influence of offshore oil extraction, shipping, and river input. The systematic model comparison confirms that the K soot-air model can more accurately reflect the gas-particle partitioning of PAHs in the atmosphere of the WSCS. We also found that the vertical migration of the elevating PAHs is accelerated by particulate matter, driving the migration of atmospheric PAHs to the ocean through dry and wet deposition, with 16% being contributed by the particle phase. The particulate matter sinking alters the PAH distribution in the water column and generates variation in source apportionment, while the contribution of PAHs loaded on them (>20%) to the total PAH reserves cannot be ignored as before. Hence, the ecological threat of PAHs increases by the oil drilling and shipping industry, and the driving force of particulate matter deserves continuous attention.

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“…Over the years, considerable geological and geophysical data have been collected. Exploration practices and research results indicate that the SYS is rich in hydrocarbons and other potential resources [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, since the pre-Sinian period, the Mesozoic-Paleozoic marine sedimentary basin of the SYS has In recent years, several studies have utilized seismic and drilling data to investigate geological structures, sedimentary layers, and oil and gas potential [2][3][4][5][6][7]10,11,16,17,[21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Exploration practices and research results indicate that the SYS is rich in hydrocarbons and other potential resources [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, since the pre-Sinian period, the Mesozoic-Paleozoic marine sedimentary basin of the SYS has In recent years, several studies have utilized seismic and drilling data to investigate geological structures, sedimentary layers, and oil and gas potential [2][3][4][5][6][7]10,11,16,17,[21][22][23][24][25][26][27][28]. However, the Paleozoic can suffer from low reflectivity in deep seismic imaging due to the strong shielding effect of the carbonate's powerful reflection interface in a seismic profile, the weak reflection amplitude of the target strata, the low signal-to-noise ratio, and the poor lateral resolution.…”

Section: Introductionmentioning

confidence: 99%

Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Yao

et al. 2023

Minerals

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To further explore the geological structure and the Mesozoic–Paleozoic hydrocarbon prospects in the northern area of the South Yellow Sea (SYS), multiple geological and geophysical data were systematically gathered and compiled, including gravity and magnetic data, seismic surveys, drilling data, and previous research results. The characteristics and genesis of the gravity and magnetic anomalies are examined. This study employs residual gravity anomalies and multiple edge detection methods to identify fault lineament structures and assess the tectonic framework. Moreover, the study utilizes 2.5D gravity-seismic joint modellings and regression analysis to estimate the basement depth. Additionally, the study examines the basement characteristics and discusses the thickness of the Mesozoic–Paleozoic strata. Finally, the study further identifies prospects for hydrocarbons in the Mesozoic–Paleozoic. Our findings show that the faults are incredibly abundant and that the intensity of fault activity weakens gradually from NW to SE. Specifically, NE (NEE) trending faults are interlaced and cut off by NW (NWW), near-EW, and near-SN trending secondary faults, which form an en-echelon composite faults system with a dominant NE (NEE) orientation. Thick Mesozoic–Paleozoic strata are preserved, but we observe distinct variations in basement characteristics and the pre-Cenozoic structural deformation along the N-S direction. Therefore, the Northern Basin of SYS (NBSYS) and the Middle Uplift of SYS (MUSYS) are characterized by alternating sags and bulges in the S-N direction and in the E-W direction, respectively, forming a chessboard tectonic framework. Considering the oil and gas accumulation model, we identify three target hydrocarbon prospects in the NBSYS and two favorable hydrocarbon prospects in the MUSYS.

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Prospective prediction and exploration situation of marine Mesozoic-Paleozoic oil and gas in the South Yellow Sea

Cited by 6 publications

References 0 publications

Carboniferous-Early Permian Heterogeneous Porous Carbonate Reservoirs Prediction and Sedimentary Analysis in the Central Uplift of the South Yellow Sea Basin

Carboniferous-Early Permian Heterogeneous Porous Carbonate Reservoirs Prediction and Sedimentary Analysis in the Central Uplift of the South Yellow Sea Basin

Sources of the Elevating Polycyclic Aromatic Hydrocarbon Pollution in the Western South China Sea and Its Environmental Implications

Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

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